Hello- we currently have sheet vinyl flooring in our kitchen and want to do the peel and stick tile. I am worried about it peeling up and not looking nice after a while...i am hoping for few years worth not 10/20 or anythig crazy like that. cannot do ceramic tile (i know that would be a better choice) so please do not suggest. We want to do it ouselves so we want to lay it over existing one (good condition just ugly loooking). I have been doing some research and from what i have gathered it is good to sand cuurent floor so it binds better and also floor grout/caulk (not sure which is best) in between, and it was 50/50 on using extra adhesive. Need some advice...Thanks!